System and method for delivery of variable oxygen flow

a variable flow and oxygen technology, applied in the direction of valves, mechanical equipment, operating means/releasing devices, etc., can solve the problems of obstructive apnea during sedation, inadequate ventilation, transthoracic bioimpedance measures,

Active Publication Date: 2016-06-16
DYNASTHETICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]measuring an oxygen flow rate through an oxy...

Problems solved by technology

Inadequate ventilation may be one cause of hazards during procedural sedation.
Central apnea occurs when the patient makes no effort or little effort to breathe and is often caused by giving too much opioid agent to the patient.
Obstructive apnea during sedation is often caused by giving too much sedative agent to the patient.
Transthoracic bioimpedance measures the change in electrical impedance across the chest using the EKG electrodes, and is often unreliable.
Additionally, transthoracic bioimpedance cannot detect airway obstruction since the patient's chest still moves during an attempt to force gas through an obstructed airway.
Capnometry is expensive and is known in the field to detect breath attempts as true breaths.
An additional limitation of capnometry is that the signal is degraded when high oxygen flow is g...

Method used

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  • System and method for delivery of variable oxygen flow
  • System and method for delivery of variable oxygen flow
  • System and method for delivery of variable oxygen flow

Examples

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Embodiment Construction

[0083]Reference will now be made to the drawings in which the various elements of the illustrated configurations will be given numerical designations and in which the invention will be discussed so as to enable one skilled in the art to make and use the invention. It is to be understood that the following description is only exemplary of the principles of the present invention, and should not be viewed as narrowing the claims which follow.

Definitions

[0084]The term “oxygen delivery failure” means the patient is failing to receive oxygen. The threshold for oxygen delivery failure could be set by a clinician, for example, failure to receive a minimum fraction of the set oxygen delivery rate, such as 50% of the oxygen delivery rate. This cause of the oxygen delivery failure could be a failure of the oxygen delivery device, such as if the oxygen delivery device is displaced or if the oxygen supply is insufficient. Oxygen delivery failure could also be caused by a patient's apnea, or fail...

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Abstract

A method and apparatus to deliver a variable flow of oxygen to a patient is described. The apparatus may include a flow control valve, a pressure sensor to detect a patient's breathing pressure and ambient pressure, an oxygen flow analyzer to measure oxygen flow to the patient, and a processor to analyze the breathing pressure values, ambient pressure value, and oxygen flow rate values and to determine when a patient is inhaling. When the processor determines the patient is inhaling, the processor calculates an optimal oxygen flow rate to deliver to a patient, which may depend on a pre-selected flow rate and an oxygen backlog, and the processor sends a signal to the flow control valve to deliver the optimal oxygen flow rate to the patient.

Description

FIELD OF INVENTION[0001]This invention relates generally to breathing detection systems and methods and oxygen delivery systems and methods. It is particularly directed to a system and method for delivery a variable flow of oxygen to a patient.BACKGROUND[0002]Inadequate ventilation may be one cause of hazards during procedural sedation. Apnea, or lack of respiration, can be caused by the drugs that the patient receives through the intravenous port during sedation. Central apnea occurs when the patient makes no effort or little effort to breathe and is often caused by giving too much opioid agent to the patient. Obstructive apnea occurs when the airway tissues are so relaxed that they block gas flow, thereby reducing the volume of air that the patient receives. Obstructive apnea during sedation is often caused by giving too much sedative agent to the patient. Respiration is usually monitored during sedation using a pulse oximeter that measures the oxygen saturation in the patient's a...

Claims

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Application Information

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IPC IPC(8): A61M16/10A61M16/06A61M16/20A61M16/00
CPCA61M2016/0027A61M2016/003A61M2202/0208A61M2205/18A61M2205/3334A61M16/204A61M16/1005A61M16/0069A61M16/0003A61M16/0051A61M16/0666A61M2205/502A61M16/10A61M16/0677A61M16/024
Inventor ORR, JOSEPH
Owner DYNASTHETICS
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